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1. Thermistor <br />NOTE: Each detector consists of a dust - <br />resistant chamber, a solid state, <br />functional internal sensor, and <br />microprocessor -based electronics with <br />a low -profile plastic housing. <br />f <br />Thermal i <br />Detector <br />Model HI921 contains a tri-color LED indicator, capable of flashing any one (1) of three (3) distinct colors: GREEN <br />YELLOW I RED. During each flash interval, the microprocessor -based detector monitors the following fire -system <br />conditions: <br />Temperatures reaching programmed thresholds <br />Internal sensors and electronics are functional <br />Based on the results of the monitoring, the LED indicator flashes the following: <br />FLASH COLOR <br />CONDITION <br />FLASH INTERVAL <br />[in seconds] <br />Normal supervisory operation. <br />GREEN*: <br />Temperature has not reached programmed <br />10 <br />alarm thresholds or set points. <br />YELLOW: <br />Detector is not operating at <br />4 <br />normal capacity and needs replacement. <br />Alarm' condition <br />1 <br />NO FLASH: <br />Detector is not powered. <br />— <br />* denotes LED can be turned OFF <br />Please follow the corresponding description of the panel used. <br />A quick visual inspection is sufficient to indicate the condition of the detector at any time. <br />If more detailed information is required, a printed report can be provided from the respective Cerberus PRO Modular <br />FireFinder XLSIV or Model FC9-series FACPs that indicates the status and settings assigned to each detector. <br />All Model HI921 detectors use a surface -mounting base, Model DB2-HR I DB-11 or Model DB-11 E, which mounts on a <br />4-inch (10.2 cm.) octagonal, square or single -gang electrical box. The base utilizes screw -clamp contacts for electrical <br />connections and self -wiping contacts for increased reliability. <br />The Model DB-1 1 detector base can be used with the optional Siemens Model LK-11 detector locking kit, which contains <br />50 detector locks and an installation tool to prevent unauthorized removal of the detector head. Model DB-11 has <br />aesthetically conducive plugs to cover the outer mounting -screw holes. <br />Model HI921 may be installed on the same initiating circuit with the Siemens Model 'H'-series detectors and <br />devices [when used with Cerberus PRO Modular I Model FC9-series I FireFinder XLSIV FACPs] — <br />• HFP-11, HFPT-11 <br />• Model 'XTRI'-series interfaces <br />• Model 'XMS'-series manual stations <br />• Model'HTRI'-series interfaces <br />• Model 'HMS' -series manual stations <br />• Model HCP output -control detection devices <br />• Model 'HZM'-series of addressable, conventional zone modules <br />Siemens <br />usa.siemens.comlfire <br />Smart Infrastructure - Building Products —2— <br />